Screw-driver.



C. A. RYAN.

scew omvsn.

^ APPLICATION FII-EI.)V APR. 26, 1916 1I. 29,793@ Patented June 12, 1917.

l 5 I .I .Il .WMIIIWKIIIMM @in III II IfIII IIIIIIIIHIHIII m IIIIMIII|I iI .Y I. .I W, ,0. VIII||IIII1I| MII IIIIIII/ "I` a/wIhHIIhWMWUINIlwIAI CHARLES A. RYAN, OF MARION, NEW YORK.

SCREW-naiven.

Specification of Letters Patent.

Patented June 12, 191 7.

Application filed April 26, 1916. Serial No. 93,713.l

T 0 all whom 'it may concern.'

Be it known that I, CHARLES A. RYAN, a citizen of the United States, residing at Marion, in the county of lVayne and State of New York, have invented new and useful Improvements in Screw-Drivers, of which the following is a specilication.

This invention relates to an attachment for screw drivers, and is particularly designed to provide .means whereby a screw may be effectively7 held to be engagedby 'the bit of the screw driver without interfering with the liree operation of thescrew.

An object of the invention is to produce an attachment for screw drivers in the lna` ture of a sleeve or socket member which is salida-bly arranged upon the shank of the screw driver and is adapted to be limited in an outward direction by contact with the shoulder between the bit and shank of the said screw driver, the said socket having an open side which is closed by a spring pressed dog, the said dog having an operating handle or tail easily accessible tothe operator and whereby the head of a screw may be arranged in the socket and held Vtherein by the dog to receive the bit of the screw driver and also whereby the free rotation of the screw drivel' in the socket or an outward movement of the same through the socket will not be interfered with.

A still further object of the invention is to provide a screw retaining attachment for screw drivers which, when not arranged to engage with a screw, and positioned'rrppn the shank of the screw driver will serveas a guide for the said screw driver.

A still further obj ect of the invention is to produce an attachment for screw drivers which may be easily and quickly positioned upon any ordinaryclass of screw drivers.

'Another object of the invention is to produce a device of this character which shall embody the desirable features of simplicity in construction, cheapness to manufacture, ease in application and thorough etliciency in operation.

IVith the above and other objects in view the improvement resides in the construction, combination and arrangement of parts set forth in the Jfollowing specification and falling within the scope of the appended claim.

In the drawing:

Figure 1 is a perspective view illustrating my improvement applied upon a screw driver and showing the same engaging the screw,

Fig. 2 is a central verticallongitudinal sectional view through the saine, and

Fig. 3 is a perspective view of the attachment.

In the drawing, the numeral l designates a screw driver which includes the usual rounded shank 2 and theenlarged end or head V3 which has its opposite sides beveled to its end to provide'wthe bit 4.'

The attachment is broadly indicated by the numeral 5 and includes. a substantially rectangular sleeve or socket member 6. The sleeve or socket member 6 is! formed with a longitudinally extending groove 7 that enters from one of its sides and through both of its ends, and the outer 'end of the said sleeve or socket has all of its walls inclined to the central portion of the said end or toward what I will term the mouth of the attachment, The groove, at the rear portion of the sleeve or socket is of a greater depth than at the mouth oit the saidsleeve or. socket, and the inner wall provided by the groove at the said mouth, indicated for distinction by the numeral S, is centrally formed with a rounded depression 9 and the shoulder provided at the juncture of the groove 7 and the wall 8 is rounded or l'lared, as indicated by the numeral 10.` Vhat I will term the rear face ofthe sleeve or socket member 6, or the face opposite that formed with the groove 7 is provided with a sub,-

'stantially rectangular depression for a portion of its length to receive one of the arms 11 of a spring member, the said arln 11 being secured, as at 12, to the sleeve or socket. The spring member is substantially U- shaped in side elevation and the connecting member for the arms 11 and 13, indicated by the numeral 14, is arranged over the rear face of the sleeve or socket and covers the groove 7. This portion 14C of the spring is provided with a rounded opening through which the shank 2 of the screw driver passes, and the second arm 13 of the said spring is secured upon the outer face ot a dog 15 which has its inner edge pivoted at the rear of the sleeve or socket, as indicated by the numeral 16. The dog is of a width to be snugly received within the groove 7 and the said dog has its inner face, for a suitable distance from its pivoted end, provided with a longitudinally extending groove or channel 17, the end wall provided thereby being flared to the inner face proper of the said dog, and the straight face engaging end of the dog is formed with a longitudinally extending rounded depression 18 which is disposed opposite the depression 9 in the mouth of the sleeve or socket 6. The depressions are adapted to receive the shank 19 of a screw and the grooves or channels 7 and 19 of the sleeve or socket and the dog are oi a sufficient depth to receive the head of the screw whereby the kerf in the said head may be readily engaged by the bit 4L of the screw driver. The spring pressing upon the dog will eiectively hold the same in contacting position with the screw, but when the screw driver is revolved and the bit thereof contacts with the inner face of the dog, the said dog will be moved to an outward position so that the screw may be driven entirely home. The dog is provided with a rearwardly extending preferably angularly disposed extension forming an operating handle or tail 20, the same being, as will be noted, easily accessible to the operator so that the said dog may be swung to an open position to permit of the insertion of the screw in the mouth of the sleeve or socket 6 to be engaged by the bit of the screw driver.

It will be further apparent that when the attachment is moved away from the bit of the screw driver and upon the shank thereof, the saine may be grasped by the hand of an operator and the attachment will thereby serve as a guide means for operating the screw driver. It will also be apparent that the screw driver may be employe-d for removing screws. In this instance the bit 4 is projected beyond the socket until the head of the screw is withdrawn a sufficient distance to be received within the said socket, and the dog is operated to permit of the sleeve being moved longitudinally oi the bit to permit of the head of the screw being wholly received within the socket. By this arrangement it will be noted that the sci'ew may be wholly withdrawn and retained in the socket of the screw driver.

From the above description, taken in connection with the accompanying drawing, the simplicity of the device, as well as the advantages thereof will, it is thought, be perfectly apparent to those skilled in the art to which such invention appertains without further detailed description.

Having thus described the invention, what I claim is:

The herein described attachment for screw drivers comprising a sleeve member formed with a longitudinal groove extending through both of its ends and one of its sides, the inner wall provided bythe groove being rounded throughout, and the rear wall of the sleeve, at one of the ends thereof being rounded toward the open side of said sleeve, a dog having' one of its ends pivotally secured in the said open side of the sleeve and its opposite end rounded toward the referred to rounded end of the sleeve, said dog having its inner face formed with a round groove throughout the length thereof, a substantially U-shaped spring straddling the sleeve and dog and having one of its arms secured to the sleeve and its other arm secured to the dog, whereby to normally force the dog within the groove of the sleeve, the connecting member for the sleeve having a central opening to receive the shank of the screw driver, and a tail member providing a handle arranged angularly upon the arm of the spring connected with the dog.

In testimony whereof I aiiix my signature.

CHARLES A. RYAN.

Copies of this patent may be obtained for five cents each, `by addressing the Commissioner of Patents, Washington, D. G. 

